LabInformationLab tests, explained

Oxycodone/Oxymorphone and Metabolite Screen in California

This page explains the oxycodone/oxymorphone and metabolite screen, what it measures, and how to arrange it. This test detects oxycodone, oxymorphone, and their breakdown products in a blood sample. It is ordered to check for recent use, confirm a prescribed medication is present, or investigate suspected overdose. Blood testing shows current levels rather than past use. Across California, part of Pacific, the oxycodone/oxymorphone and metabolite screen can be ordered directly and collected at a certified site — no referral required.

Sample type
blood
Category
Drug & Urine Screening
Turnaround
1-3 business days
Price
$158
Referral
Not required

This test detects oxycodone, oxymorphone, and their breakdown products in a blood sample. It is ordered to check for recent use, confirm a prescribed medication is present, or investigate suspected overdose. Blood testing shows current levels rather than past use.

What it measures

  • Oxycodone — The main prescription pain medication being tested for.
  • Oxymorphone — A stronger metabolite (breakdown product) of oxycodone; also available as its own medication.
  • Noroxycodone — Another metabolite of oxycodone, often measured to confirm the body processed the drug.
  • Noroxymorphone — A metabolite of oxymorphone, useful for distinguishing sources.

Who it is for

Healthcare providers order this test in emergency rooms, pain management clinics, or during monitoring of prescribed opioid therapy. It may also be used in workplace or legal settings where recent use is relevant.

Preparation

No fasting or special preparation is needed. Tell the collector about any medications you take, including oxycodone or oxymorphone, because they can affect results.

Results and what they mean

Results are reported as detected or not detected, sometimes with a numeric level. A clinician interprets them alongside your history and other findings. This information is not medical advice; only your provider can explain what your results mean.

Requesting the Oxycodone/Oxymorphone and Metabolite Screen in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. Because the region is uneven, coastal metros, inland towns, and rural counties with very different access to testing — worth planning around when you book.

Frequently asked questions

How long after taking oxycodone can this blood test detect it?

Blood levels peak within a few hours and usually fall below detection within about 12 to 24 hours, though this varies by dose, metabolism, and individual factors.

Can this test tell if I took oxycodone versus oxymorphone?

Yes. The pattern of parent drug and metabolites can help a clinician see which substance was taken, but interpretation requires expertise.

Will my prescription cause a positive result?

Yes, if you take prescribed oxycodone or oxymorphone, the test is expected to be positive. Always inform the testing staff of your prescriptions.

Is this test confidential?

Yes. Results are protected health information and are shared only with those you authorize or as required by law.

Oxycodone/Oxymorphone and Metabolite Screen by city in California

All testing in California →   Full Oxycodone/Oxymorphone and Metabolite Screen guide →